Guillermo Rivera Aranguiz defeated Alex Theiler 6-2 6-2 in the Colombia F5 round of 32 on clay. The result followed the form book — Guillermo Rivera Aranguiz came in leading the head-to-head 4–0. Guillermo Rivera Aranguiz extended the head-to-head to 5–0.
Rivera Aranguiz G. took it in straight sets.
Guillermo Rivera Aranguiz beat Alex Theiler 6-2 6-2. Umpiry, "Guillermo Rivera Aranguiz vs Alex Theiler — Colombia F5 Round of 32", https://umpiry.com/match/2011-08-29/aranguiz-vs-theiler-colombia-f5-r32?utm_source=cite (as of 29 August 2011).